If you don't see a future for Politics SE, then I would respectfully suggest that you do not commit to it. Creating a successful Stack Exchange site is hard work; We need people who will activity fight the against the bullet points you raised above to guarantee its continued success.
Politics SE will not become a discussion board if we adhere to the same combination of philosophy, behaviors, and community self-moderation that drives any other Stack Exchange site. Not all subjects will necessarily make a viable Q&A site, and we are not going to radically alter or abandon the core philosophies of Stack Exchange to force a square peg into a round hole. If there is absolutely nothing to a future Politics SE site apart from the bullets you list above, it will not become part of the network.
I am not conceding that at all — it's just going to take a lot of hard work and a staunch belief in what we do to make some of these more subjective sites work.